*{
    margin: 0px;
}

.bg{
    display: flex;
    justify-content: center;
    align-items: center;
    /* 浏览器高度 */
    height: 100vh;
    background-image: url("../img/wallhaven-ey8o9l_1920x1080.png");
    filter: blur(6px);
    overflow: hidden;
}
.center{
    height: 350px;
    width: 300px;
    position: fixed;
    background-color: white;
    right: 15vw;
    top: calc(100vh/2 - 400px/2);

}

.center>div{
    display: flex;
    justify-content: center;
    margin-top: 10px;
}
.center>div:nth-child(2)>div:nth-child(1){
    width: 18px;
}
.center>div:nth-child(2)>div:nth-child(2){

    width: 180px;
}

.center>div:nth-child(3)>div:nth-child(1){
    width: 18px;
}
.center>div:nth-child(3)>div:nth-child(2){

    width: 180px;
}

.center>div:nth-child(1){
    font-size: 30px;
    margin-bottom: 40px;
}

.button{
    display: flex;
    justify-content: center;
    text-align: center;

}

.button>div{
    width: 100px;
    height: 30px;
    background-color: blue;
    border-radius: 25px;
    line-height: 30px;
    color: white;
    cursor: pointer;
}

.button>div:nth-child(1){
    margin-right: 10px;
}
.button>div:nth-child(2){
    padding-left: 10px;

}
#username{
    border: none;
    border-bottom:  2px  solid  gray;
    outline: none;
    height: 30px;
    font-size: 20px;
    width:200px;
}

#password {
    border: none;
    border-bottom:  2px  solid  gray;
    outline: none;
    font-size: 20px;
    width:200px;
}
#code {
    height:  30px;
    border: none;
    border-bottom:  2px  solid  gray;
    width: 100px;
    outline: none;

}
#refresh{
 cursor: pointer;
    -moz-user-select:none;
    -webkit-user-select: none;

}



